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Investigation of the correlation between mechanical chip morphology and surface residual stress for Ti6Al4V alloy
Journal of Mechanical Science and Technology ( IF 1.6 ) Pub Date : 2020-09-14 , DOI: 10.1007/s12206-020-2210-0
Z. R. Wu , K. K. Zhu , L. Pan , L. Fang , Y. D. Song

A numerical simulation analysis of mechanical chip morphology and residual stress for Ti6Al4V alloy was conducted under different cutting speed and feed rate. Johnson-Cook constitutive model and shear failure model were selected in the simulation procedure. The correlations between the mechanical chip morphology and surface residual stress were detailed. The results show that the chip morphology characterized with the degree of serration Gs and the serrated frequency f has a direct impact on residual stress distribution. With the increase of the degree of serration Gs, the maximum residual tensile stress decreases, while with the increase of the serrated frequency f, the maximum residual compressive stress increases on the surface. The research of the present paper provides a new way to understand and evaluate residual stress distribution for titanium alloy mechanical process.



中文翻译:

Ti6Al4V合金机械切屑形态与表面残余应力的相关性研究

在不同的切削速度和进给速度下,对Ti6Al4V合金的机械切屑形态和残余应力进行了数值模拟分析。在仿真程序中选择了Johnson-Cook本构模型和剪切破坏模型。详细介绍了机械切屑形态与表面残余应力之间的关系。结果表明,以锯齿度Gs和锯齿频率f为特征的切屑形态对残余应力分布有直接影响。随着锯齿度Gs的增加,最大残余拉应力减小,而随着锯齿频率f的增大,表面上的最大残余压应力增加。

更新日期:2020-09-14
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